FreeBSD/Linux Kernel Cross Reference
sys/kern/sysv_ipc.c
1 /* $FreeBSD$ */
2 /* $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Herb Peyerl.
19 * 4. The name of Herb Peyerl may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "opt_sysvipc.h"
35
36 #include <sys/param.h>
37 #include <sys/ipc.h>
38 #include <sys/proc.h>
39 #include <sys/ucred.h>
40
41 #if defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG)
42
43 /*
44 * Check for ipc permission
45 */
46
47 int
48 ipcperm(p, perm, mode)
49 struct proc *p;
50 struct ipc_perm *perm;
51 int mode;
52 {
53 struct ucred *cred = p->p_ucred;
54
55 /* Check for user match. */
56 if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) {
57 if (mode & IPC_M)
58 return (suser(p) == 0 ? 0 : EPERM);
59 /* Check for group match. */
60 mode >>= 3;
61 if (!groupmember(perm->gid, cred) &&
62 !groupmember(perm->cgid, cred))
63 /* Check for `other' match. */
64 mode >>= 3;
65 }
66
67 if (mode & IPC_M)
68 return (0);
69 return ((mode & perm->mode) == mode || suser(p) == 0 ? 0 : EACCES);
70 }
71
72 #endif /* defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) */
73
74
75 #if !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG)
76
77 #include <sys/proc.h>
78 #include <sys/sem.h>
79 #include <sys/shm.h>
80 #include <sys/syslog.h>
81 #include <sys/sysproto.h>
82 #include <sys/systm.h>
83
84 static void sysv_nosys __P((struct proc *p, char *s));
85
86 static void
87 sysv_nosys(p, s)
88 struct proc *p;
89 char *s;
90 {
91 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
92 p->p_comm, p->p_pid, s);
93 }
94
95 #if !defined(SYSVSEM)
96
97 /*
98 * SYSVSEM stubs
99 */
100
101 int
102 semsys(p, uap)
103 struct proc *p;
104 struct semsys_args *uap;
105 {
106 sysv_nosys(p, "SYSVSEM");
107 return nosys(p, (struct nosys_args *)uap);
108 };
109
110 int
111 __semctl(p, uap)
112 struct proc *p;
113 register struct __semctl_args *uap;
114 {
115 sysv_nosys(p, "SYSVSEM");
116 return nosys(p, (struct nosys_args *)uap);
117 };
118
119 int
120 semget(p, uap)
121 struct proc *p;
122 register struct semget_args *uap;
123 {
124 sysv_nosys(p, "SYSVSEM");
125 return nosys(p, (struct nosys_args *)uap);
126 };
127
128 int
129 semop(p, uap)
130 struct proc *p;
131 register struct semop_args *uap;
132 {
133 sysv_nosys(p, "SYSVSEM");
134 return nosys(p, (struct nosys_args *)uap);
135 };
136
137 /* called from kern_exit.c */
138 void
139 semexit(p)
140 struct proc *p;
141 {
142 return;
143 }
144
145 #endif /* !defined(SYSVSEM) */
146
147
148 #if !defined(SYSVMSG)
149
150 /*
151 * SYSVMSG stubs
152 */
153
154 int
155 msgsys(p, uap)
156 struct proc *p;
157 /* XXX actually varargs. */
158 struct msgsys_args *uap;
159 {
160 sysv_nosys(p, "SYSVMSG");
161 return nosys(p, (struct nosys_args *)uap);
162 };
163
164 int
165 msgctl(p, uap)
166 struct proc *p;
167 register struct msgctl_args *uap;
168 {
169 sysv_nosys(p, "SYSVMSG");
170 return nosys(p, (struct nosys_args *)uap);
171 };
172
173 int
174 msgget(p, uap)
175 struct proc *p;
176 register struct msgget_args *uap;
177 {
178 sysv_nosys(p, "SYSVMSG");
179 return nosys(p, (struct nosys_args *)uap);
180 };
181
182 int
183 msgsnd(p, uap)
184 struct proc *p;
185 register struct msgsnd_args *uap;
186 {
187 sysv_nosys(p, "SYSVMSG");
188 return nosys(p, (struct nosys_args *)uap);
189 };
190
191 int
192 msgrcv(p, uap)
193 struct proc *p;
194 register struct msgrcv_args *uap;
195 {
196 sysv_nosys(p, "SYSVMSG");
197 return nosys(p, (struct nosys_args *)uap);
198 };
199
200 #endif /* !defined(SYSVMSG) */
201
202
203 #if !defined(SYSVSHM)
204
205 /*
206 * SYSVSHM stubs
207 */
208
209 int
210 shmdt(p, uap)
211 struct proc *p;
212 struct shmdt_args *uap;
213 {
214 sysv_nosys(p, "SYSVSHM");
215 return nosys(p, (struct nosys_args *)uap);
216 };
217
218 int
219 shmat(p, uap)
220 struct proc *p;
221 struct shmat_args *uap;
222 {
223 sysv_nosys(p, "SYSVSHM");
224 return nosys(p, (struct nosys_args *)uap);
225 };
226
227 int
228 shmctl(p, uap)
229 struct proc *p;
230 struct shmctl_args *uap;
231 {
232 sysv_nosys(p, "SYSVSHM");
233 return nosys(p, (struct nosys_args *)uap);
234 };
235
236 int
237 shmget(p, uap)
238 struct proc *p;
239 struct shmget_args *uap;
240 {
241 sysv_nosys(p, "SYSVSHM");
242 return nosys(p, (struct nosys_args *)uap);
243 };
244
245 int
246 shmsys(p, uap)
247 struct proc *p;
248 /* XXX actually varargs. */
249 struct shmsys_args *uap;
250 {
251 sysv_nosys(p, "SYSVSHM");
252 return nosys(p, (struct nosys_args *)uap);
253 };
254
255 /* called from kern_fork.c */
256 void
257 shmfork(p1, p2)
258 struct proc *p1, *p2;
259 {
260 return;
261 }
262
263 /* called from kern_exit.c */
264 void
265 shmexit(p)
266 struct proc *p;
267 {
268 return;
269 }
270
271 #endif /* !defined(SYSVSHM) */
272
273 #endif /* !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) */
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